Glass-tube cutter



"No Model.)

F. McGAR.

. GLASS TUBE GUTI'ER. 1 No. 433,537. Patented Aug. 5, 1890 v lm/emar, 62W 3 gzzww/e 7/4 a/u, 13/ 5 %W K W m E5555,

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UNITED STATES PATENT O FICE.

FREDERICK MOGAR, OF BRISTOL, CONNECTICUT.

GLASS-TUBE CUTTER.

I SPECIFICATION forming part of Letters Patent No. 433,537, dated August 5,1890.

Application filed February 20, 1890. Serial No. 341,139. (No model.)

To 0. whom it may concern:

Be it known that I, FREDERICK MOGAR, a citizen of the United States, residing at Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Glass-Tube Cutters, of which the following is a specification.

My invention relates to improvements in glass-tube cutters; and the objects of my improvement are simplicity of construction, convenience of operation, and general efliciency in use.

I11 the accompanying drawings, Figure 1 is a side elevation of my cutter. Fig. 2 is an end View on an enlarged scale, and Fig. 3 is an enlarged section of one end of said cutter on the line'oc 03 of Fig. 2.

A designates the cutter proper, which consists of a small hardened-steel roller pivoted to roll freely, the same'being too well known to require a specific description. Instead of pivoting said cutter in the ordinary form of head or frame, I pivot it in a transverse slot at the end of a rod B, with its axis extending in the same general direction as said rod, whereby the edge of said rolling cutter stands transversely thereto and projects slightly at one side of said rod, as shown.

Upon the rod B, I arrange a sliding gage C, which is provided with a set-screw a for securing it in any desired position to which it may be adjusted on said rod. This gage is of such a form that it serves the double func-' tion of agage and handle. I prefer to groove the rod B longitudinally, as at b, and let the end of the set-screw restin said groove,whereby the former always sustains a certain relation to the rolling cutter and enables the op erator to more conveniently hold the cutter in the desired position for cutting by using the head of said set-screw for a thumb or finger rest.

When it is desired to cut a tube, the gage is adjusted on the rod until the rolling cutter A stands at a distance from the confronting face or end of the gage C equal to the length of the part of the tube to be out off. The cutter is then inserted within the tube, the handle is held firmly with a thumb against the head of the set-screw so as to locate the cutter, the tube placed upon some flat surface,

as a table or bench, and rolled along with the cutter, impinging against the inner surface of the tube, so as to cut a mark around the inside of said tube as it thus rolls. The tube can then be easily broken off at the point thus cut, provided it does not come apart under the pressure of the cutter without other force.

I claim as my invention- 1. The herein-described glass-tube cut-ter, consisting of the rod B, the rolling cutter A at one end of said rod, the sliding gage C, and a handle on the body of said rod, substantially as described, and for the purpose specified.

2. A glass-tube cutter consisting of the'rod A, the rolling cutter mounted thereon, with its edge transversely to said rod,and the combined sliding gage and handle C, mounted on the body of said roll, substantially as de scribed, and for the purpose specified.

3. A glass-tube cutter consisting of the rod B, having longitudinal groove b, rolling cutter mounted on said rod, with its edge transversely thereto, the combined sliding gage and handle 0, and set-screw a, with its end resting in said groove, whereby said screw sustains a certain relation to the rolling out ter, substantially as described, and for the purpose specified.

4. A glass-cutter consisting of a rod with rolling cutter at its end and a handle from which said rod projects, the Whole forming a single arm only, whereby the tool is adapted to be inserted within a tube and held against revolution while the tube is rolled along over the surface of a table or bench, substantially as described.

FREDERICK MCGAR.

lVitncsses:

JAMES SHEPARD, JOHN EDWARDS, Jr. 

